Contact-wheel.



No. 836,639. --PTENTEDNW 2o, 1906. E.L.DUNN.

CONTACT WHEEL.

4 APPLIOATION FILED FEB.21, 1906.

Fig. elevation of the whee.

provide such wheels with'im Ation-bearingswhich may-rea EDWAsaD L. DUNN,0F. WASHINGTON, DIsTRiCI TED STATES' .PATENLi 'GLBTI-"ICPlA orCOLUMBIA-Assieme Nasaeee.

To all whom, it may concern:

Be it known that I, EDWARD L. DUNN, a citizen of the United States,residing at Washington, in the District of Columbia, haveinventedcertain new and useful, Improves,"

ments in Contact-Wheels, of whichthe following is a specification.

My Invention relates to an improvement in contact-wheels for use inconnection with overhead conductors, the objectbeing to rovedantifricand replaced in a new wheel when the old one, .by reason of thewear or vrough usage, becomes unit for further use. .Y

With thisA and other ends lin view my invention consists in parts andcombinations of parts, as will be more fullyexplained, and pointed outin the claims. Y 1 In the accompanying drawings, Figure 1 is a view ofthe upper end of`a trolley-pole with the wheel shown in section.

Figs. 3 and are views in side elevation and section ofthe cen-- tralsection of one side bearing. Figsand 6 are views inside elevation andsection of the outer'section of the outer ring, 7 and 8 are similarviews of the inner sectionits outer falce.

Aduced at its and Figs.

of the outer rings; 1 represents a trolley-pole provided at its upperend withthe harp 2, carrying the' in 3, on which the trolley-wheel ismountedp to This wheel consists of a body 4, having the usual peri heralgrooveA and rovided centrally with a` ore 6,- consid'erab y larger thanthe pin 3, o'n whichthe wheel is mounted. ,The bore 6 'is not of thesame diameter' throughout `its length, but is somewhat recenter, so ast\o form shoulders 7, againstwhich the bearings restf` Each wheel hastwo antifriction-bearings l and as they are alike a description of onebiesuicient. Eachbearing comprises an outer ring 8,- having aninwardlyprojecting iange 9 on its outer end v.and one or ,more V fshaped ribs l0, extendin '.transverselyacross These ribs are adaptedv`to fit within correspondingly-shaped recesses formed in .the body ofthewheel, as clearly shownin Fig. 2, and lock the bearings in,

place.' The inner surface ofthe ring 8 adjacent to the ange 9 is lsmoothto receive the half-'bearing 11, which maybe pushed into Speccation ofLetters Patent. Application nea February 21, 1906. serial No. soazzi.

`cated V-shape ily be removed therein, 'the latter being, 2y is a viewin sideV openings n the hubs ,-14 of t Patented Novr 20, 1906.

place, while .theremaining portion-of theinner surface is threadedto'receive the thread -ed half-bearing`12., Each half-,bearing-ll and 12is provided with a beveled-edge,so

Athat thetwov when assembled and .lockedwithin the ring 8, as abovedescribed, 'form a V-shap'ed raceway, in whichl the steel-ballsor t etwo half-bearings 11 and 12 is the cylindrical hub 14,

peripheral, groove', which forms the. inner In assembling this bearingthe half-bearing 11 isiirst pushed in-t'omsition against'flange 9 andthe hub 14 place ing. '.'The'balls 13 are then drop ed into the rac'ewayand all th'eparts locke provided with a centrally-lo#v raceway for theballs 1,3.-

in place by.

spheres 13 rest and move. l Located within within said half-bearscrewinghome the half-bearing 12; l-The two. bearings thus constructed andassemf' bled are forced into their respective 'seats within the bore onopposite sides of the wheel.

It has been found in actual practice that" thel rictional contactbetween the ringsS and wheel is sufficient to retain the bearmgls inplace; but as the wheel is carried in the of the trolley-pole4accidental ,displacement of either bearing is absolutelyprevented;

constructed.- is mounted on secured to lthe Vupper f the-current isconveyedu The Wheei thus the pin 3, .removabl endof the harp 2 an to thepole or to conductors in or on thel olle by the 'springs 1'5, whichlatter bear at t eir upper ends against the outer faces of the ole.

the v 'e space 6 withinthe'bore of the wheel formsv a chamber, inwhichgraphite is acked,` @p35* sage ofthe current this gra hite softens and 4cient quantities .9 5

and as the wheel is warmed iup by. t

enters the bllraces ins to keep all the moving surfaceswell lubricated.f

rings 8 and .are 'secured at their lowerends to` The-'pin Swaybe'an'gular in cross-sctini.

and pass through 'corresplondingly-shaped--n to hold the latter againstrotation; 'but'I pref e bearings, so asf fer to make itcylindrical andhave it t the hubs .suiciently tight to prevent any rota 4 tion'of thelatter. v I

This construction, by-re'ason ofthe lack of friction; increasesglthelifeof the wheh v,but

when the latter becomes vfor'fu 1'tlier "11se,l 'by reason of wear-orother damage Incldental to the rough ,usage to which they are Sulriect'-ros ed, the bearings can be removed intetend readily. inserted inother.Wheels Wthgntfthe use of any tools Whatever.

It is evident that other forms off-removable@ bearings may be employedin` lieu of those shown. Hence I would have it understood -that I do notconne myself to the details 'offs' the bearings, but considermyself"at-.l1`ber.ty\y

to make suchohanges as faixlylfallwithingtbe spirit and scope of 1ninvention.

Hewing. thllsdesri edmy lwntin, what traJIy; said bore, 'o f, tworempvableanf, tinctxonfbeangjs sepenately assembled; and.

an nuten linginelosng andy fornngapaptet wardmovement,l the, Ainundarprogection in againstinward .1 novement.v

. 2. The ,combiifation Wiihmwheel-heyinge centrali bg'rje.. :and:l,solidt .annnlenprojeetion nnWARnfnmnNN.

Witnes'ses;

- JAMEJ Hiirwmsolv,

'JnoemKiNew said'barings ,and

Thecombnation with a Wheel having a this In testil'nonywhereoilhaxe'signadgnly name to. thlespefietipnfin' thepvlfesencf

